Datasheet

LT3845A
23
3845afa
TYPICAL APPLICATIONS
9V-24V to 3.3V, 2-Phase at 10A per Phase, DC/DC Converter with Spread Spectrum Operation
V
IN
SHDN
C
SS
BURST_EN
V
FB
V
C
SYNC
f
SET
BOOST
TG
SW
V
CC
BG
PGND
SENSE
+
SENSE
–
SGND
C5
1µF
16V
D2 BAS19
C3 8200pF
C11
47pF
M1
Si7850DP
M2
Si7850DP
D1
B160
L1
4.7µH
R
SENSE
0.005Ω
LT3845A
C4
2.2µF
16V
R3
1.21M
R4
1.21M
V
IN
24V
R6
130k
SYNC
C
IN
6.8µF
50V
×2
C
IN
: TDK C4532X7R1H685K
C
OUT
: MURATA GRM32ER60J107ME20
D1, D3: DIODES, INC. B160
L1, L2: VISHAY IHLP-5050FD-01
V
IN
SHDN
C
SS
BURST_EN
V
FB
V
C
SYNC
f
SET
BOOST
TG
SW
V
CC
BG
PGND
SENSE
+
SENSE
–
SGND
C10
1µF
16V
C8 8200pF
M3
Si7850DP
M4
Si7850DP
D3
B160
L2
4.7µH
R
SENSE2
0.005Ω
LT3845A
C9
2.2µF
16V
3845A TA05
R10
130k
R9
4.99k
C7
5600pF
C6
47pF
C
IN3
0.1µF
100V
SYNC1
SYNC2
SYNC
R1
10k
R11
500k
R12
25k
D5
5.7V
C11
0.1µF
Q1
R2
16.8k
LTC6908-1
V
+
GND
SET3
6
5
4
1
2
3
OUT1
OUT2
MOD
C
OUT
100µF
6.3V
×6
V
OUT
3.3V
20A
D4 BAS19